WhichOne › DIY store & garden › plant › fertiliser › lawn fertiliser › liquid lawn fertiliser

The best liquid lawn fertilisers in comparison

Guaranteed independent and reliable
Millions of satisfied users every year
Last updated on 16.05.2025

Filter

Sort

Brand:Reduced items only:

Best choice

Westland 20400549 Safelawn Liquid 1L, Green

13% off

free shipping

show more show less

9,9

Offer ends in:

04Days

07hours

46minutes

20seconds

Check price

Show on Amazon

Features

Made with 100% natural ingredients, this feed contains seaweed that acts as a natural biostimulant and also has a low salt content so it is safe to use on young lawns.
Ideal for use in the summer months for fast greening results, this slow release fertiliser produces long lasting but fast acting results.
Keep in a safe, dry frost-free place away from children, pets and food.
Shake well before use.
Fill watering can or sprayer using 50ml of product per 4.5L of water to cover 5sq.m.

Miracle-Gro Water Soluble Lawn Food, 1 kg

Miracle-Gro

36% off

free shipping

show more show less

9,8

Check price

Show on Amazon

Features

Note- Packaging May Vary
Easy to apply using the Miracle-Gro Feeder or mixing in a watering can

£ 6.99

£ 8.73

Recommendation

Richard Jackson Flower Power Premium Lawn Magic, Lawn Feed for Gardens, Greens the Grass & Strengthens the Roots (5L)

Flower Power

free shipping

show more show less

9,8

Check price

Show on Amazon

Features

PROFESSIONAL INSPIRED FORMULA Lawn Magic can be used all year round as long as the ground temperature is above 5 C. No need to buy any other specialist feeds for different seasons
FROM RICHARD JACKSON S GARDEN Contains added seaweed extract for bio-stimulant benefits and natural sugars to build disease resistance. The professional secret of green, healthy, great looking lawns
UNIQUE DOUBLE ACTION Lawn Magic does two jobs in one. It greens the grass and strengthens the roots. It s the lawn feed used and trusted for many years by the professionals

Multi-Mite 5 Ltr Liquid Seaweed -100% Natural & Organic Concentrate Cold Pressed Plant & Soil Fertiliser, Trees Lawn Veg & House Plants Root or Foliar Feeding

Multi-Mite

free shipping

show more show less

9,7

Check price

Show on Amazon

Features

ELIXIR OF LIFE FOR ALL PLANTS IN A BOTTLE - Our Liquid Seaweed is packed full of Carbohydrates, not only do your plants use complex carbs in their structure and as food, it's also a tasty snack for a host of beneficial Microorganisms that help create the perfect ecosystem for your greenery. Supposedly MULTI MITE Liquid Seaweed Concentrate is so powerful that it may even bring plants previously thought dead back to life!
WITH MULTI-MITE SEAWEED SUITABLE FOR ALL PLANTS - you'll unlock the Power of the Sea for your plants! This Dynamite Fertiliser is filled with beneficial nutrients for your beloved botanicals. Whether you're growing yummy veggies, encouraging a tree to grow, trying to get your lawn to look its best, or just want a little boost for your house plants, this MULTI MITE fertiliser is a great choice.
USED BY PROFESSIONALS AND BY US MORTALS - Ideal for every gardener with greenhearts as well as green fingers, MULTI MITE is completely 100% Natural. ZERO thickeners, colourants or other chemical additives in MULTI MITE plant fertiliser, just PURE Seaweed Extract! It's organic nature is one advantage; another is replaceability, seaweed is a Fully Fresh Bed resource. Kiss artificial Chemical Fertilisers and animal-based goodbye and embrace the oceanic goodness of MULTI MITE Seaweed Concentrate!
Please note we are in the process of updating our branding, and for a short period, products may be shipped with our previous branding, see last image, the product is excatly the same and there is nothing to worry about.

Miracle-Gro EverGreen Fast Green Spray & Feed, Liquid Lawn Food, 1 Litre

free shipping

show more show less

9,7

Check price

Show on Amazon

Features

Greens lawns in 24 hours under normal growing conditions
Coverage of up to 100 m sq
Attach to a hose to feed and water the lawn at the same time

Plantworks Ltd Empathy Lawn Feed Liquid Seaweed Stimulant 1L

16% off

free shipping

show more show less

9,6

Check price

Show on Amazon

Features

EMPATHY SUP LAWN FEED SEAWEED 1L

Pro-Kleen Lawn Tonic Liquid Iron Sulphate Quality Ferrous Conditioner, Fertiliser, Grass Greener, Turf Hardener | Long-Lasting for a Healthier Looking Garden | Helps Prevent Lawn Disease (5 Litres)

Pro-Kleen

6% off

free shipping

show more show less

9,6

Check price

Show on Amazon

Features

Our super concentrate liquid lawn tonic rich in sulphate of iron and extract of seaweed, this lawn tonic encourages strong, healthy grass, Grass will be greener and produce a healthy dense sward, Pro Kleen lawn tonic improves the appearance and quality of lawns. It is also highly effective in turf hardening.
Transforming your grass has never been easier. With our Lawn Tonic you can turn your dull and dying grass into strong and green grass in no time!
Our thoroughly revised, tried and tested formula even helps to prevent lawn disease with its turf hardening qualities. On the back of the bottle are easy to follow instructions. Simply mix the suggested dosage with water and apply to your lawn with a pump sprayer or a watering can and wait for results to appear. It's that easy!
Pro-Kleen Lawn Tonic is extremely easy to use! Simply mix the suggested dosage with water and using a pump sprayer or a watering can, apply it to the grass that you wish to treat
After it has applied, simply wait for the results to appear! It really is that easy

£ 15.93

£ 19.95

Dark Green Lawn Fertiliser - High in Nitrogen Greens Grass Fast - Feeds up to 90 Days - Child and Pet Friendly - Garden Lawncare Guy

Garden Lawncare Guy

free shipping

show more show less

9,5

Check price

Show on Amazon

Features

GREEN UP ANY LAWN - Fast acting lawn feed that's packed full of the nutrients your lawn needs to grow thicker and greener. Nitrogen, potassium, phosphorus, calcium and magnesium for lush looking grass
SAFE FOR GARDENS - Our lawn feed is designed with safety in mind and does not require toxic warning pictograms. Simply follow the instruction and it can be safely applied in gardens enjoyed by children and pets.
MADE IN THE UK - Manufactured in the UK our products are tailored to green up your grass for an amazing looking lawn

GS Plant Foods Liquid Seaweed Fertiliser, OMRI Listed & Certified Organic Plant Food, Concentrate Liquid Seaweed for Gardens, Lawns & Soil Yields

GS Plant Foods

free shipping

show more show less

9,4

Check price

Show on Amazon

Features

UNBEATABLE QUALITY Experience the power of nature with our Kelp & Seaweed Fertilizer. OMRI listed for organic gardening, GS Plant Foods Liquid Seaweed Fertiliser offers a pure and natural solution for your garden's needs. Enhancing soil conditions, it promotes robust root growth and greater nutrient absorption for thriving plants. Embrace worry-free gardening as our seaweed plant food is free from harmful chemicals, nurturing your plants and preserving the environment with every application.
ORGANIC NUTRIENT BOOST Made from the finest seaweed plant Ascophyllum Nodosum, this is one of nature s miracle plant foods. Our seaweed extract improves your plant s tolerance to excessive heat, wind, drought conditions and more. It increases and stabilizes chlorophyll in plants, which results in darker green leaves and increased sugar content in plants. Investing on our seaweed feed is the best solution for revitalizing your garden, lawn and more.
EASY APPLICATION Apply liquid seaweed & kelp to improve growing conditions in all growth stages. Simply mix 2 ounces (59ml) of this liquid fertiliser concentrate into a gallon of water (3.78l) and apply. Each gallon of this mixture will then cover as much as 1,000 sq ft. Any sprayer will work, but for large areas, the hose end sprayer is easiest! This liquid seaweed feed for plants should be sprayed in the morning or late afternoon when temperatures are lower, and the leaves stoma are open.
TRUSTED & RELIABLE At GS Plant Foods, we understand that you are placing your trust in us to provide you with the highest quality organic seaweed fertiliser products available. We have 100% confidence in the quality of our products and continuously strive to deliver the best customer experience. Our products are natural, easy to use, cost efficient, sustainable, and yield consistent & amazing results in your garden, no matter what you're growing or what medium in which your plants are growing.

envii SeaFeed Xtra – Organic Seaweed Fertiliser, Liquid Outdoor Plant Food Ideal for all Plants, Lawns, Gardens and House Plants, Rich in Additional Nutrients - 1 Litre Makes up to 500L

envii

show more show less

9,3

Check price

Show on Amazon

Features

Boosts Plant Growth & Crop Yields - Natural Seaweed fertiliser that enhances strong & healthy plant growth, promotes lush foliage, and increases crop yields for thriving plants.
100% Organic & Vegan - Seafeed Xtra is made from natural, sustainably sourced ingredients & certified Organic by OF&G.
User Friendly Design Comes with an easy-to-use bottle featuring a built-in measuring chamber for hassle-free application. One litre of Seafeed Xtra makes up to 500 litres of feed when diluted, suited for all size gardens.

This ranking is created through algorithmic analysis of millions of products tailored specifically to your search. We aim to find the most suitable product for you based on manufacturer information and price. The ranking reflects our opinion and should serve as a good starting point for your purchase. We would like to point out that we have not tested the products ourselves and link to selected online shops and partners from which we may receive compensation.

You might also be interested in these liquid lawn fertilisers.

Maxicrop PPSI61L Sequestered Iron, 1L - Iron Infused Natural Seaweed Extract - Protects Against Yellowing - Supports Growth In Difficult Soil Conditions - Plant Nutrition, Blue

ORGANIC Approved and certified for organic growing by the Soil Association

~~£ 15.50~~ free shipping

Check price

Maxicrop 86600259 Moss Killer & Lawn Tonic, 2.5L - Fast Acting 2-in-1 Moss Killer and Lawn Re-Growth Tonic - with Natural Seaweed Extract - Improves Lawn Health and Strong Rooting - Garden Care

KILLS MOSS Fast acting moss killer that blackens moss within a matter of hours

~~£ 20.46~~ free shipping

Only:

31hrs

46min

21sec

Check price

ZOPPER All Year Lawn Feed Liquid Fertilizer with Iron Feed and Fast Acting with Iron Concentrate and Micro-nutrients 1 Liter

Year-Round Nourishment No more seasonal feeding! ZOPPER's unique formula delivers continuous nourishment, promoting vibrant green growth from spring to winter.

~~£ 9.88~~

Check price

Greenforce G60105 Green Force Instant Lawn Tonic 2.5 litres

Wash of hard surfaces (kerbing walls tarmac etc) risk of staining

~~£ 21.49~~ free shipping

Check price

Miracle Grow Liquid Lawn Feed - Lawn Fertiliser Bundle of 1L Fast Green Concentrate Lawn Food & 1L Ready to Use Spray and Feed Lawn Grass Fertiliser with Topline Card for Richer and Greener Grass

Child & Pet Friendly Safe to use around children and pets, giving you peace of mind as you care for your plants. Non-toxic formula ensures a safe gardening environment for your entire family.

free shipping

Check price

MOOWY Spring Boost Spring and Summer Lawn Feed 400 m² - Noticably Greener Grass in 3 Days - Fast Growth and Firm Roots - Rebuild Your Lawn's Natural Resistance after Winter Dormancy

WATER IS ESSENTIAL - No water no results! Please ensure that your lawn is sufficiently watered after the application of our Spring Lawn Feed. Otherwise the effects might be delayed and less impressive. For optimal results mow up to twice weekly and apply the grass feed every 6 to 8 weeks.

free shipping

Check price

Maxicrop All Purpose Plant Growth Stimulant, 1L - Natural Seaweed Based Liquid Biostimulant - Multivitamin Boost for All Garden Plants - Strong Roots - Healthy Growth - Builds Resilient Crops

GROWTH STIMULANT A powerful natural plant growth stimulant with added seaweed extract that brings out the best in your plants

free shipping

Check price

Garden Genie FAM0321 Lawn Fertiliser Feed Liquid Concentrate - 1 Litre

Garden Genie Concentrated Lawn Feed Fertiliser is specially designed for application on all types of domestic lawns, from fine turf to rougher varieties, promoting vibrant green growth.

free shipping

Check price

Miracle-Gro All Purpose Water Soluble Plant Food Tub, 2 kg, Brown

The number one selling plant food, trusted by gardeners nationwide that grows plants twice as big as unfed plants

~~£ 15.99~~ free shipping

Check price

Vitax Green Up Lawn Care Enhance Liquid Lawn Feed 200sqm

The most advanced liquid lawn fertiliser

free shipping

Check price

Miracle-Gro THICK'R Lawn Seed, Fertilliser & Soil Improver Fertiliser, Brown

Recyclable packaging, contains 40 percent recycled plastic

~~£ 17.99~~ free shipping

Check price

Maxicrop All Purpose Plant Growth Stimulant, 2.5L - Natural Seaweed Based Liquid Biostimulant - Multivitamin Boost for All Garden Plants - Strong Roots - Healthy Growth - Builds Resilient Crops

GROWTH STIMULANT A powerful natural plant growth stimulant with added seaweed extract that brings out the best in your plants

~~£ 21.52~~ free shipping

Check price

The best liquid lawn fertilisers in comparison

Guaranteed independent and reliable

Features

Features

Features

Features

Features

Features

Features

Features

Features

Features

You might also be interested in these liquid lawn fertilisers.

Our offer